Healthy 36-year-old dies after seizure during workout: how hidden brain arteriovenous malformations (AVMs) strike and what families should know

Table of Contents

1. Key Highlights:
2. Introduction
3. How an invisible vascular tangle ended a young life
4. What is an arteriovenous malformation (AVM)?
5. How common are brain AVMs and who is at risk?
6. Common presentations: headaches, seizures and hemorrhage
7. Diagnosing an AVM: what scans and tests reveal
8. Treatment options: balancing risk and benefit
9. Family testing and genetic considerations
10. Emergency response: what to do during a seizure or suspected bleed
11. Organ donation after brain death: how a tragic loss became new life
12. The human side: family grief, advocacy and turning tragedy into purpose
13. Awareness, screening and public health: what should change?
14. Practical takeaways for clinicians and families
15. Real-world examples and outcomes
16. Resources and support networks
17. FAQ

Key Highlights:

• A silent arteriovenous malformation (AVM) caused a catastrophic brain bleed in 36-year-old Stuart Grant during a gym workout; he died within 24 hours, but his registered organ donation saved three lives.
• Brain AVMs are congenital tangles of arteries and veins that can remain asymptomatic for decades; seizures or sudden severe headache may be the first warning of rupture.
• Families affected by an AVM should consider clinical review and targeted imaging; awareness and timely emergency response can change outcomes, and organ donation remains a vital, life-saving option when brain death is confirmed.

Introduction

The afternoon routine was ordinary: a gym session at a local David Lloyd club, a man who loved sport, and no obvious health warnings. Mid-workout, Stuart Grant, 36 and described by his sister as “the healthiest man” she knew, vomited, seized and collapsed. Less than 24 hours later, Stuart had died from a catastrophic brain hemorrhage caused by an arteriovenous malformation (AVM) nested near his brain stem. The family’s account reads as a sudden rupture of normal life — and as a call to understand a condition that often hides until it kills.

Stuart’s case is heartbreaking and instructive. It highlights how an AVM can remain symptomless for decades, how a seizure or sudden severe headache can indicate a life-threatening bleed, and how a decision to be an organ donor can deliver hope amid tragedy. His liver and kidneys were transplanted, saving three people who otherwise faced death or long-term dialysis. His heart and lungs could not be used because trauma had damaged them.

This article unpacks AVMs: what they are, how they present, how they are diagnosed and treated, and what relatives should consider after a diagnosis in the family. It also explains the mechanics of organ donation after brain death, the steps families can take in an emergency, and why awareness and screening discussions matter. The goal is practical clarity: to give families, patients and clinicians a single, detailed reference that turns a shocking story into actionable knowledge.

How an invisible vascular tangle ended a young life

The chronology in Stuart Grant’s case is stark. By all accounts he was physically active, engaged in a routine exercise session, and had only occasional headaches he attributed to work stress. A sudden bout of nausea, vomiting and then a seizure unfolded within minutes. Emergency services took him to Worcester Royal Hospital. Imaging revealed a major brain hemorrhage. Intubated in intensive care, Stuart was declared brain-stem dead after tests confirmed catastrophic injury. Because he had registered as an organ donor, his liver and kidneys were allocated and transplanted — saving three recipients.

The finding that the hemorrhage originated from an arteriovenous malformation draws a familiar pattern seen across many sudden AVM presentations. AVMs are congenital; they are abnormal connections between arteries and veins that bypass the capillary bed. Blood flows through the tangle at higher pressure, and over time those delicate vessels can weaken and rupture. That rupture causes intracranial hemorrhage, sometimes with seizures or sudden neurological collapse.

Stuart’s AVM had been present since childhood but produced no symptoms severe enough to prompt investigation. His sister, Jodie, recounts that he had “a few headaches” which he dismissed. After his death she and another brother pursued testing to check whether they carried AVMs, and the family began fundraising and awareness efforts. Their response — grief shaped into action — reflects two common threads after AVM tragedies: first, the search for answers about genetic risk and family screening; second, the desire to prevent similar outcomes for others through awareness.

What is an arteriovenous malformation (AVM)?

An arteriovenous malformation is a vascular anomaly in which arteries connect directly to veins through a tangled mass of abnormal vessels called a nidus, bypassing the normal capillary network. This structural shortcut allows high-pressure arterial blood to flow into lower-pressure veins, increasing the risk of vessel rupture.

Key characteristics of AVMs:

• Congenital origin: AVMs usually develop before or shortly after birth, even if they do not become detectable for years.
• Locations: They can occur anywhere in the body — brain, spinal cord, lungs, liver, kidneys or intestines. Brain AVMs are the most clinically significant because rupture often causes life-threatening intracranial hemorrhage.
• Heterogeneous size and shape: AVMs range from small, compact tangles to large, complex networks fed by multiple arteries and draining into multiple veins. Larger lesions and those near deep, vital structures can carry higher treatment risk.
• Natural history: Many AVMs remain silent. Others produce symptoms such as headaches, seizures, focal neurological deficits, or audible bruits. The most feared outcome is intracranial hemorrhage, which may be sudden and catastrophic.

An AVM’s risk profile depends on size, location, and features such as deep venous drainage or associated aneurysms. AVMs adjacent to the brain stem — as in Stuart’s case — present high risk because bleeding or swelling there can rapidly impair vital functions.

How common are brain AVMs and who is at risk?

Brain AVMs are uncommon but not vanishingly rare. Estimates put the prevalence of intracranial AVMs in the ballpark of 10 to 18 cases per 100,000 people (roughly 0.01–0.02% of the population). Symptomatic presentation is less frequent; detection outside of symptoms often occurs incidentally when imaging is done for other reasons.

Demographics and risk factors:

• Age: AVMs most commonly present between adolescence and middle age, though they are congenital and can be diagnosed at any age.
• Gender: Incidence rates show modest variation by sex; some series report a slight male predominance, but the difference is small.
• Genetics and syndromes: Most AVMs are sporadic. A subset occurs in association with hereditary conditions such as hereditary hemorrhagic telangiectasia (HHT, Osler-Weber-Rendu), which carries an increased risk of AVMs in the brain, lungs and liver. When an AVM appears alongside HHT, family screening and genetic counseling are strongly recommended.
• No clear lifestyle cause: There is no evidence that diet, exercise, or routine adult behavior causes an AVM to form. However, high blood pressure and anticoagulation may affect rupture risk and outcome once an AVM exists.

Because most AVMs are congenital, the question is not how they begin in an adult but whether they will ever cause trouble. For many they remain clinically silent; for others they produce an initial symptom such as seizure or hemorrhage.

Common presentations: headaches, seizures and hemorrhage

Clinical presentations of brain AVMs fall into several patterns. Awareness of these presentations may prompt earlier diagnosis and life-saving intervention.

1. Hemorrhage (intracranial bleed)

• Most concerning and dramatic. When an AVM ruptures, arterial blood floods the brain or surrounding spaces. Symptoms are sudden and may include an explosive headache, vomiting, seizure, loss of consciousness, or focal deficits (weakness, numbness, speech or vision changes).
• Bleeds near the brain stem, where breathing and cardiac regulation centers reside, can be rapidly fatal, as happened in Stuart Grant’s case.

2. Seizure

• Seizures are a common initial manifestation, especially for cortical AVMs. A first-time seizure should prompt brain imaging in adults, particularly when accompanied by any focal signs or persistent headache.

3. Headache

• Chronic or episodic headache is nonspecific but can be a presenting symptom. Most headaches are benign, and occasional stress-related headaches are common. However, a sudden, severe headache — often described as the “worst headache of my life” — should raise alarm for subarachnoid hemorrhage or intracerebral bleeding.

4. Focal neurological deficits

• Progressive or sudden weakness, numbness, visual loss or speech disturbance may indicate an AVM pressing on adjacent brain tissue or bleeding.

5. Incidental discovery

• A growing proportion of AVMs are found incidentally when imaging is performed for unrelated reasons (e.g., trauma, migraine evaluation, or preoperative assessment). Incidental AVMs require careful risk assessment and specialist input.

Importantly, absence of symptoms does not guarantee safety. An AVM may remain asymptomatic until the first and only event is a life-threatening rupture. That unpredictability underpins debates about screening and management.

Diagnosing an AVM: what scans and tests reveal

When an AVM is suspected — because of seizure, sudden neurological decline, or specific imaging findings — clinicians use a sequence of tests to define anatomy, assess rupture and guide treatment.

1. CT scan (computed tomography)

• CT is usually the first-line imaging in emergency settings. It is fast and sensitive for detecting acute hemorrhage. A CT angiogram (CTA) can visualize vascular anatomy noninvasively and may suggest the presence of an AVM.

2. MRI (magnetic resonance imaging) and MRA (MR angiography)

• MRI provides detailed views of brain tissue, chronic hemorrhage, and surrounding damage, while MRA outlines blood vessels without ionizing radiation. MRI/MRA are valuable in elective workup and follow-up.

3. Digital subtraction angiography (DSA, catheter cerebral angiography)

• The gold standard for AVM imaging. DSA maps feeding arteries, the nidus, and venous drainage in high resolution. It is invasive and carried out in an angiography suite but is essential for treatment planning, especially before surgical resection or embolization.

4. Functional imaging and adjunct studies

• Functional MRI or neuropsychological testing may be used when an AVM lies near eloquent cortex to estimate risk of functional loss from intervention.

5. Brainstem testing and brain death confirmation

• When catastrophic brain injury is suspected, brain-stem reflex and apnea testing follow strict protocols to determine brain death. Confirmation of brain death may lead to organ donation discussions if the patient is a registered donor or the family consents.

Time is critical in the acute setting. CT provides rapid triage; DSA provides the roadmap for intervention. In Stuart’s case, a brain scan upon hospital arrival revealed the AVM and the devastating hemorrhage; subsequent tests confirmed the medical team’s assessment of irreversible brain-stem damage.

Treatment options: balancing risk and benefit

Treatment of brain AVMs ranges from conservative observation to multimodal intervention. Decisions rest on a careful evaluation of rupture history, lesion anatomy, patient age and functional status, and patient preferences.

• Conservative management (watchful waiting)
  • Selected small, asymptomatic AVMs with low-risk features may be monitored with periodic imaging. The decision to observe often weighs the annual risk of hemorrhage against the immediate procedural risks of treatment.
• Microsurgical resection
  • Complete surgical removal eliminates the nidus and achieves immediate cure when feasible. Microsurgery is most appropriate for accessible AVMs in non-eloquent cortex and when the anticipated surgical risk is acceptable.
• Endovascular embolization
  • A catheter-based procedure delivers embolic agents (glue, particles, coils) into feeding arteries to reduce blood flow to the nidus or to occlude associated aneurysms. Embolization often serves as a preoperative adjunct to reduce bleeding risk during surgery or as a standalone therapy in selected cases.
• Stereotactic radiosurgery (SRS)
  • Focused radiation (e.g., Gamma Knife) aims to induce gradual obliteration of the AVM over months to years. Radiosurgery suits small to medium AVMs not amenable to safe surgical removal but requires patience: obliteration may take years, during which hemorrhage risk persists.
• Combined approaches
  • Many complex AVMs require staged or multimodal treatment: embolization followed by surgery or radiosurgery, for example. Management is best decided by a multidisciplinary cerebrovascular team.

Risks and outcomes

• Treatment risks vary with lesion size, location and the patient’s baseline neurological function. Surgery near eloquent cortex or the brain stem carries higher morbidity. Embolization and radiosurgery have their own profiles of complications, including ischemia, delayed radiation necrosis or incomplete obliteration.
• For ruptured AVMs, emergency intervention focuses on stabilizing the patient, controlling intracranial pressure, and treating the bleed; definitive AVM treatment may be delayed until the patient recovers sufficiently.
• Long-term prognosis depends on whether the AVM is fully obliterated and on the extent of any hemorrhagic injury that occurred before or during treatment.

Clinical trials and controversy Large trials and observational data continue to refine when best to intervene. For selected unruptured AVMs, randomized data have suggested caution in aggressive intervention where procedural risk outweighs natural hemorrhage risk. Every case requires individualized assessment.

Family testing and genetic considerations

When a person is diagnosed with an AVM, relatives often ask whether they should be screened. The answer hinges on etiology. Most AVMs are sporadic and not inherited. However, AVMs can be part of genetic syndromes:

• Hereditary hemorrhagic telangiectasia (HHT)
  • HHT is an autosomal dominant disorder characterized by telangiectasias and multiple AVMs, commonly in the lungs, liver and brain. When an AVM is accompanied by nosebleeds, mucocutaneous telangiectasias or a family history of HHT, referral for genetic testing and family screening is warranted.
• Other rare syndromes
  • Certain overgrowth or vascular syndromes can include AVMs among their manifestations. Specialist genetic input helps parse rare scenarios.

Practical guidance for families:

• If a first-degree relative (parent, sibling, child) has a brain AVM, discuss the case with a neurologist or vascular neurosurgeon. Many clinicians will recommend a neurological history and, in selected circumstances, an MRI brain with angiographic sequences for relatives.
• If an AVM was discovered incidentally and has no suggestive family history or HHT features, routine family-wide imaging may not be indicated. Shared decision-making is essential: factors such as anxiety, family history and the specific AVM features influence choices.
• Genetic counseling can clarify testing options and implications for family planning.

Stuart’s family opted to pursue testing themselves — a reasonable step given the emotional impact and the wish to know whether other siblings carry the anomaly. For many families, the choice is both medical and psychological: knowing can offer relief or prompt preventative treatment, but it also brings the burden of surveillance.

Emergency response: what to do during a seizure or suspected bleed

Timely action in the moments after a seizure or sudden neurological change can save lives and preserve function. Basic, high-yield steps:

• If someone has a seizure:
  • Call emergency services if the seizure lasts longer than five minutes, if it's the person’s first seizure, or if the seizure is followed by prolonged confusion, difficulty breathing, or repeated seizures.
  • Protect the person from injury: move sharp objects away, cushion the head, loosen tight clothing.
  • Do not restrain movements or force anything into the mouth.
  • Time the seizure. Seizures lasting longer than five minutes require urgent medical attention (status epilepticus).
  • After convulsions cease, place the person in the recovery position if they are breathing and monitor until help arrives.
• If someone experiences sudden severe headache, vomiting, or focal weakness:
  • Treat as a possible stroke or intracranial bleed. Call emergency services immediately.
  • Note the time when symptoms began; treatment decisions (e.g., thrombolysis for ischemic stroke) can depend on onset time.
  • Keep the person still and calm; do not give anticoagulant medications or aspirin unless a physician advises.
• At the hospital:
  • Emergency staff will perform a CT head to identify bleeding and triage treatment.
  • Rapid neurosurgical assessment is essential when imaging shows a hemorrhage or space-occupying lesion.

Prompt recognition and accurate triage reduce preventable delays in care and provide the best chance for a favorable outcome.

Organ donation after brain death: how a tragic loss became new life

Stuart’s family had made the personal decision to register him as an organ donor. When brain-stem death was confirmed, clinicians and transplant coordinators assessed organ viability and matched recipients. The liver went to a woman in her thirties; the kidneys went to two men in their fifties and sixties. The heart and lungs could not be used because trauma had compromised them.

Key steps in the organ donation process when brain death occurs:

• Brain death confirmation: Clinicians follow established protocols to confirm irreversible loss of brain function. Only after this confirmation can organ donation proceed with the family’s consent or according to the deceased’s registered wishes.
• Medical assessment: The transplant team evaluates organ function, infection status and suitability for transplantation. Tests determine whether organs are healthy and safe.
• Matching and allocation: Recipients are identified through national allocation systems that consider blood type, size, urgency, waiting time and immunological compatibility.
• Timing and logistics: Organs have limited ischemic tolerance. Kidneys can usually be preserved longer than livers, while hearts and lungs require faster retrieval and transplantation. Coordination among surgical teams, transport services and transplant centers is intensive.
• Family involvement: Even when a person is registered as a donor, families are canvassed and supported through the decision process. Many families find meaning and solace in donation.

Donation outcomes and realities

• A single donor can save or significantly improve multiple lives. Typical harvests may include kidneys, liver, heart, lungs, pancreas or small bowel, depending on suitability.
• Traumatic injury to the chest or severe infection can preclude cardiac or pulmonary donation, as occurred with Stuart.
• Beyond the clinical mechanics, organ donation stirs deep emotions. For grieving families, knowing that a loved one saved other lives often provides a measure of solace.

Public policy context

• Countries vary in donor registration systems (opt-in vs opt-out) and in how family input is considered. Regardless of legal framework, clinical teams prioritize clear communication, respect for the deceased’s wishes, and bereavement support for families.

The human side: family grief, advocacy and turning tragedy into purpose

Jodie Grant’s words capture the disorientation that follows sudden, unexpected loss: “Suddenly I was getting a call from my mum to say my older brother was going to die, or be severely brain damaged. And he died. I’ve never experienced anything like this, losing a healthy sibling with no warning. It fundamentally changes you.”

Families in the aftermath of AVM deaths often navigate overlapping challenges:

• Grief and shock: Sudden loss without prolonged illness interrupts the usual anticipatory processes that make grief more manageable.
• Need for answers: Why did this happen? Could it have been detected? Could it have been prevented? Families often seek genetic testing, medical records and second opinions.
• Decisions about testing and screening: Should siblings undergo imaging? Is there a risk for the next generation? These questions require tailored conversations with specialists.
• Advocacy and fundraising: Many families channel grief into fundraising, awareness campaigns or support for research. Stuart’s family organized a fundraising walk for The Butterfly AVM Charity and engaged with influencer Nikki Lilly, who has a craniofacial AVM and has been public about her experience.
• Conversations about organ donation: Families may find comfort in knowing the deceased saved other lives; sometimes donation decisions become a focal point for meaning-making.

The public face of an AVM tragedy can influence awareness. Personal stories put a human context around clinical facts and can motivate others to register as donors or to seek medical attention for worrying symptoms.

Awareness, screening and public health: what should change?

AVMs pose challenging questions for clinicians and policymakers because of their congenital origin, variable natural history, and the potentially dramatic consequences of rupture. While broad population screening for asymptomatic AVMs is not currently recommended, targeted approaches deserve attention.

Points for consideration:

• Targeted screening for high-risk groups: Individuals with hereditary hemorrhagic telangiectasia or other known syndromes that predispose to AVMs should be offered screening per specialist guidance.
• Family-centered decisions: When a first-degree relative presents with symptomatic AVM, clinicians should discuss the pros and cons of imaging for siblings and offspring. MRI is noninvasive and is the preferred modality for screening the brain.
• Public education on red flags: Raising awareness about warning signs — sudden severe headache, new seizures, focal deficits — can prompt earlier emergency response. A public health campaign focused on stroke and seizure recognition already reaches many; adding AVM-specific awareness could be incorporated into those messages.
• Research priorities: Better natural history data, improved noninvasive imaging, and advances in minimally invasive treatments will shape future guidelines. Clinical trials that compare management strategies help refine which unruptured AVMs benefit from intervention.
• Support for bereaved families and survivors: Funding for rehabilitation, neuropsychological services and counseling should be part of system-level responses to AVM-related injury.

Screening debates are complex. Population-wide MRI screening would be costly and identify many incidental lesions of uncertain significance, with potential for overtreatment. The pragmatic approach focuses on high-yield, clinically driven imaging and robust family counseling.

Practical takeaways for clinicians and families

For clinicians:

• Maintain a high index of suspicion for intracranial hemorrhage when adults present with sudden severe headache, vomiting, seizure or focal neurological signs.
• Use CT for rapid triage in emergency settings; follow with MRI/MRA and DSA as clinically indicated.
• Engage multidisciplinary teams — neurosurgery, interventional neuroradiology, radiation oncology and neurology — early to plan management.
• Discuss organ donation sensitively and transparently when brain death occurs; coordinate with transplant teams promptly.

For families:

• If a relative has an AVM, consult a neurologist or vascular neurosurgeon about the need for imaging and genetic counseling.
• Recognize red-flag symptoms: sudden severe headache, new-onset seizure, sudden weakness, numbness, vision or speech changes.
• Learn basic seizure first aid and stroke recognition. Time matters.
• Consider registering as an organ donor and discuss your wishes with family members. Clear documentation and family conversations make difficult moments less fraught.
• Seek support: bereavement counseling, patient support groups and specialized charities such as The Butterfly AVM Charity offer resources and community.

Real-world examples and outcomes

Stuart Grant’s case demonstrates several recurring themes in AVM-related tragedy: a fit, active adult with trivial preceding symptoms; sudden seizure and collapse; a brain-stem hemorrhage with rapid neurologic deterioration; confirmation of brain death and organ donation that saved three lives.

Other real-world patterns underline different facets of AVM care:

• Seizure as first sign: Numerous patients present initially with a single seizure. After diagnosis, anticonvulsant therapy and targeted AVM treatment may prevent further events.
• Incidental discovery: Routine imaging for unrelated complaints uncovers AVMs that prompt careful risk–benefit discussions about surveillance versus intervention.
• Pediatric AVMs: Children diagnosed with AVMs raise special concerns about lifetime hemorrhage risk and neurodevelopment, often tilting decision-making toward definitive treatment when feasible.
• Survivors of hemorrhage: Some patients survive AVM rupture with varying degrees of disability; rehabilitation and long-term neurological care become priorities.

Each case reinforces the need for individualized decision-making and multidisciplinary expertise.

Resources and support networks

Families and patients affected by AVMs can find practical, emotional and informational support from several sources:

• Specialist neurosurgical centers with cerebrovascular expertise for diagnosis and treatment planning.
• Genetic counseling services, particularly when HHT or other syndromic features are suspected.
• Patient charities and support groups that provide information, peer support, and advocacy; in the UK, The Butterfly AVM Charity is an example noted by Stuart’s family. Influencers and advocates who have lived experience — such as Nikki Lilly, who was diagnosed with a craniofacial AVM as a child — can amplify awareness and reduce stigma.
• Organ donation registries and transplant coordinators for information on donation processes and options.

When seeking information, prioritize reputable clinical sources and consult specialists to interpret individual risk and management options.

FAQ

Q: What causes an AVM? A: AVMs are congenital vascular anomalies that form when developing arteries and veins connect abnormally, creating a tangle (nidus) that bypasses capillaries. Most are sporadic; some occur as part of genetic syndromes such as hereditary hemorrhagic telangiectasia. No typical adult behavior causes AVMs to appear.

Q: Can AVMs be detected before they rupture? A: Yes. Some AVMs are found incidentally on imaging done for unrelated reasons, or they present with seizures or chronic headaches prompting investigation. However, many remain silent until an initial hemorrhage. Detection depends on imaging: MRI/MRA for routine assessment; DSA for detailed mapping.

Q: If someone in my family has an AVM, should I be screened? A: Discuss the case with a neurologist or vascular neurosurgeon. If the affected relative has features suggesting a hereditary syndrome (e.g., HHT) or if multiple family members are affected, genetic testing and screening are appropriate. For isolated, sporadic AVMs without family history, routine screening for all relatives is not universally recommended but may be considered based on individual circumstances.

Q: What are the treatment options and their risks? A: Options include surgical resection, endovascular embolization, stereotactic radiosurgery and combinations of these. Each carries risks related to lesion location, size and the patient’s condition. Complete cure is achievable for many AVMs with appropriate treatment but not all lesions are amenable to safe intervention.

Q: What are red-flag symptoms that require urgent medical attention? A: Sudden, severe headache (often described as the worst headache of one’s life), new-onset seizure, sudden weakness or numbness, difficulty speaking, sudden vision loss, or loss of consciousness. These symptoms may indicate intracranial bleeding or stroke and require immediate emergency care.

Q: How does organ donation work after brain death? A: When brain death is formally confirmed according to clinical protocols, organ donation may proceed with the deceased’s prior registration or the family’s consent. The transplant team assesses organ viability, matches recipients, and coordinates retrieval and transplantation. A single donor can save multiple lives.

Q: Are AVMs hereditary? A: Most AVMs are not hereditary. A subset is associated with genetic disorders like HHT, which is inherited in an autosomal dominant pattern. Genetic counseling clarifies inheritance risk and screening recommendations.

Q: What should families do after an AVM-related death? A: Families can request medical records, seek genetic counseling if indicated, consider imaging for relatives after clinical consultation, and access bereavement support. Many families find purpose through advocacy, fundraising, or support group involvement.

Q: Can lifestyle changes prevent an AVM from rupturing? A: There is no evidence that lifestyle changes prevent AVMs from forming. General vascular health measures — controlling high blood pressure, avoiding smoking where possible, and managing medications that affect bleeding risk — are sensible but do not eliminate AVM risk. Management of an existing AVM should be decided with specialist input.

Q: Where can I find reliable information and support? A: Consult specialist centers for cerebrovascular disease, neurological societies, and established charities focused on vascular malformations. Discuss any medical concerns with your primary clinician, who can provide referrals to appropriate specialists.

Stuart Grant’s death is both a personal tragedy and a public reminder: silent vascular anomalies can end lives without warning, but informed vigilance, timely emergency care and the generosity of organ donors can transform outcomes — for families, for recipients, and for communities. Families confronted with an AVM diagnosis deserve clear clinical guidance, compassionate support, and access to the full range of diagnostic and therapeutic options. Knowledge and preparedness do not erase loss, but they shape the choices that follow.